Mood disorders + treatments

Information about Unipolar, Bipolar and seasonal affective disorder plus treatments.

Includes alot of the stuff you need to know but cut down into shorter descriptions etc.

Perfect for PSYB3 exam - not too sure on other examaners etc,...hope this helps

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Mood Disorders

Unipolar depression ­ Symptoms and diagnosis

This is the most common form of depression where a person experiences an extremely
depressed or sad mood state that may last for weeks or months if not treated.

5-7 % of adults suffer from unipolar depression which is similar to rates…

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High energy, increased social and sexual activity, talkative, little sleep (Behavioural
and physiological)

Diagnosis of Bipolar depression requires that both a major depressive episode and a manic
episode be present. The duration of each of these may vary for example one time they may
last for a day but another…

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Explanations for Mood Disorders

Biological explanations

Genetics ­ Twin studies show that concordance rates for identical twins for Bipolar
depression are much higher than for dizygotic twins or other relatives. One study by Kendler
have also shown concordance rates for mood disorders being higher in women than men
however other…

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It has also been shown that when people are exposed to negative events over which they
have no control they score high on a depressive mood questionarre.

Lewinsohn offered a behavioural explanation for depression based on operant conditioning.
He argued that a loss such as splitting up with your boyfriend…

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Psychodynamic explanations

How a child deals with and responds to loss and dependency in childhood sets the pattern
for how the adult responds to similar experiences later in life. Grief as a result of loss in early
childhood is often followed by feelings of rejection. Because the childs ego is…

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Biological treatments

Drug therapy ­ There are three main categories of anti-depressant drug:

Tricyclic antidepressants- Prevents noradrenalin and serotonin being taken back into
the neuron after it has been released. The effect of this is to increase the activity
levels of these neurotransmitters.
Monoamine oxidase inhibitors (MAOIs)- Work by stopping…

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Electroconvulsive therapy (ECT)- Induces a brain seizure by passing electricity through
the brain. The person is first anaesthetised and then given a muscle relaxant;
electrodes are placed on the head and an electric shock is given.
This is usually used as a last resort if the person has not responded…


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